Professor wong measured the intelligence and temperament of a group of preschoolers. he plans to follow the same group of participants over time and collect similar data when the children are in 3rd grade, 6th grade, and 9th grade. which type of research design does this scenario exemplify?

The answer is "longitudinal design".

A longitudinal study is a research design that includes rehashed perceptions of similar factors (e.g., individuals) over short or significant lots of time (i.e., utilizes longitudinal information). Usually a kind of observational examination, despite the fact that they can likewise be organized as longitudinal randomized experiments. Longitudinal studies about in this manner roll out watching improvements more precise and are connected in different fields.

e would be the answer